he founded the chaos computer club to draw public attention to the risks of information technology. >> our motto is to protect private data but to use public data. our government data should be electronically accessible. those ideas date from the 1980's. >> information security and censorship are major themes of this year's congress, billed as europe's biggest gathering of independent computer experts. one star guest was u.s. internet activist jake of applebaum -- jacob applebaum. he warns that governments are increasingly spying on citizens and said there are plans to build in that massive data mining centers in the u.s. there was also criticism of germany for the data it collects in the name of security. >> we see some services want to break into their citizens computers. the goal is to control the networks. this happens in china, saudi arabia, and india. while european and american politicians flirt with censuring the internet or restricting it. of course we oppose that. >> among the club's hacktivists, programmers and i.t. experts have boosted attendance to record levels. >> when